Machine for making incandescent lamps.



W. R. BURROWS.

MACHINE FOB. MAKING .INGANDESGENT LAMPS.

APPLICATION FILED MAY 23. 1906.

un llll Il Patented Jan. 2, 1912.

4 SHEBTSQSHBET 1,

\VHnesSeS im; w.

william Rurmws Atcy.

W. R. BURROWS.

MACHINE Fon MAKING INGANDBSGBNT LAMPS.

APPLICATION FILED MVAY 23, 1906. v 1,013,124, Patented Jan. 2,1912.

W. R. BURROWS.

MACHINE FOB. MAKING INGANDESGENT LAMPS.

APPLICATION FILED MAY 23, 1966.

Patented J an. 2, 1912.

4 SHEETS-SHEET 3,

)Tu/@116011 Wil I iam Rurrows l W. R. BURROWS.

MACHINE PoR MAKING IMGAMDBSGBNT LAMPS. APPLICATION FILED yMAY 23, 1906. 1,013,124, Patented Jan.2,1912.

4 SHEETS-SHEET 4.

by M/m MEQ.

candescent Lamps,

rhave heretofore been I UNiTgED `s'rrrrnsf PATENT crimen'.

WILLIAM R. BURROWS, OF NEWARK, NEW I'EIRSE'I'Y,l ASIGNOR T0 GENERAL ELCTRIC COMPANY, A CUB-PORATION 0F NEW YORK. l J

` i MACHINE FQB.-` MAKING INCANIESCENT LAMPS.

To 'all whom t may concern:

Be it known that I, WILLIAM a citizen of the Newark, county of Essex, State of New ersey, have invented certain new and useful Improvements in Machines for Making Inof which the following is R. BURRows,

a specification.

This lnvention relates `to machlnes for use in the manufacture, of incandescent lamps,4

and the object of the invention is to providev a machine for performing certain steps in the manufacture of such lamps whlch (performed thus effecting a consi erable reduction in the cost of production of such lamps.

n may be'termed a combined exhausting and My invention involves a machine which sealing-off machine, as the function of the machine ,is to receive the lamp bulbs after the stems carrying the vfilaments have been mounted thereln, exhaust the air from the bulbs both by mechanical pumps and the chemical process, and finish them by sealingoii the connection through which the air is exhausted so that after leaving the machine,

`the bulbs` areready to receive the bases. l

p pumps successively In the exhaustion of'incandescent lampbulbs nit .has been common heretofore to em'- ploy two pumps, a rough pump for ei'ecting the preliminary exhaustion and a final pump vacuum. I prefer to employ two such pumps and -in'combination therewith a valve` the movable member of which zisactuated by suitable power-driven devices to connect the to the'bulbs, a rotatable frame being arranged to support a plurality ofthe bulbs and carry. themvaround into to'the'bulb and position. for exhaustion byl the pumps and b v the lchemical process and for sealing-olf.

-The devices-for sealing-oil" are automatic in their action and operate to apply heat to` the proper point in the connection between the bulb and tubulat-ure andJ then move the v bulb, tubulature and iame relatively with great delicacy,

formonly a small tip.. This feature, of my invention is of great. importance; it enables an unskilled operator to seal-off lampsveryquickly, whereas heretofore this-step in the manufacture of the Ilamps has been performed far more slowly l Specification of Illetters Patent. oAppumumm mea my as, 190e. seriai No. 4318,307. i

United States, residin aty hand,

for increasing the degree of` so as, to close the connection Patented Jan. l2, v1,912.

erator has-,few duties tofperform, the workl is done very rapidly and hence at small cost.

characteristic of my invention will be definitely indicated in the claims appended hereto. 4 I

I have illustrated the preferred embodilment of my invention inthe accompanying drawings, 1n whichigure 1 ism front view 'of the machine broken away in part; Fiy 2 is a similar view on a larger scale of le upper part of the machine; Fig. 3 is atop view of the same; Fig. 4 is a front view of a portion of the operating mechanism below the table; Fig. 5 is a top. view of the same; Fig. 6 is a vdet-ail view in section of a modified form of :support for a lamp bulb; Fig. 7 is adiagrammatic detail view of the vacuum indicato'; ll `ig. 8 is a diagram of the electrical connections; .Fig. 9 is a detail view of the rheostat; Figs. 10 and ll-are-views showing two positions of the cam for raising the sealing-'off mechanism; Figs. 12 and 13 are views of the movable and stationary members of the lvalve; and Fig. '14 is anfelevat-ion of the adyusting mechanism for the heater for efectlng the chemical exhaustion.

Referring first to Figs. 1, 4 and 5, indicates theV top of a table or'bench on the upper and lower sides of which most of the operating mechanism of the machine is supported. At the side of the table a pulley 2 .is mounted on a shaft and arranged to b'e driven from a suitable source of power,

The novel features which I believe to be and secured thereto is a pulley, 3 and a also on a sprocket 9,7 to communicate continuous rotary motion to sprocket 9 and to a clutch-member 10 secured thereto, the l s rocket. and clutch-member being loose upona shaft 11, mounted in suitable bearings Mounted for rotation in bearings 13 is a shaft 14 in axial alinement with shaft 7 and secured on the end of this shaft is a member 15, having an opening' therethrough parallel to its axis, in which a pin 16 is adapted to move.l This pin is pressed by a suitable spring ina direction to cause Aits end to enter one of a plurality of openings'in a-Y disk l, secured on theend of shaft 7 .i Mounte in bearings formed in- ,tegral with the bearings 13, is a shaft 18, on the end of which is secured a crank-19. Pivoted onan arm 20 depending from. the under side of the table-is a lever 21, which is rconnected to a sliding link-having aprojection 22 thereon. A disk 23 provided with projections or teeth 20 and 20 is .geared to shaft 21 driven in any'. desired manner and a clutch 22' operated by a edal 23 is arranged to disengage the di opy erating mechanism from the shaft when the ed 'to move.

jection 22, the free en d off arm 25 isgraisedfree of the head of pin1,6,' and the spring presses pin 16 forward until its end enters` `an opening in disk 17, thereby clutching shaft 7 in driving relation to shaft 14. When projection 22is released, a spring 24 vconnecting arstud on shaft 1&1to a station;

ary'part rocks shaft 18 back-to vits initial l.position this movement being limited by an arm 24 on' the end of shaft 18, until the free end of arm 25 lies close to -`the periphery of 'member 15, and as shaft 14 is nearingthe .completion`of. one revolution,t he head of meshingwith a gear 27 on ashaft 28 which .pin 16 .engages the inclined side of arm 25 and rides up 'the incline, thus withdrawing pin 16 fromv clutching relation to disk 17 and bringing shaft 14 to rest after it has' made one complete revolution.

Onjthe end ofl shaft 14 is a pinion 26 is mounted in suitable bearingsV 28 directly above shaft'14; on the'sid'e of-'gear 27 is, a.. 'pin 29," and extending into the path ofx movementof this pin' 1s an arm 31 carried by a shaft 30 which is arranged to rock in suitable bearings 30 depending from the table 1. Grearv4 27 has twice as many teeth as pinion 26, so that'every second revolution of shaft 14 Icauses pin 2 9 tomove the` free end of arm 31 downward` and-immediatelv release the same, thus rocking shaft 30; Oil the opposite end of shaft 30 is secured a clutch-operating lever 32, one Iend'of which is connected to the table 1 by ay coiled spring (Fig. 13) of, 47,(Fifg. 12

33, which serves to turn the shaft 30 back i to its original position, when arm 31 is released by `pin 29., The 'other end of lever 32 is adapted to operate an arm 35 pivoted upon the side ofla disk 34 secured upon the .shaft 11. Tjhe free end of arm 35 is secured tonne end of a strip -36- wound spirally upon the clutch-member 10 and connected at its other end to a block v37 secured on disk 34. A spring 38 connects the yfree end of arm 35 with a stud on disk 34 and operates,

when arm 35 is released, to turn' the arm on its pivot, and thus draw the spirally-formed strip 36 tight upon the clutch-member 10 in order .to connect the clutch-member in driving relation to shaft 11. It will be seen that every second revolution of shaft 14 rocks shaft 30 in its bearings, lifting the end of arm 32 andpermitting spring 38 to tighten the clutch-strip 36 upon clutchmember 10, and .thus effecting rota-tion ofv vshaft 11; as shaft 30 is turned back to its initialposition immediately, the end of levver 32vis brought down upon the periphery of disk 34, and as shaft 11 completes one revolution, the end of'lever 32 engagesarm 35 and turns it on its pivot,thus loosening the strip 36v and bringing shaft 11 to rest.

On the end of shaft 11 .is a bevel gear 39 meshing with a bevel gear 40 having the same-number-of teeth as gear 39 and secured upon a vertical shaft 41 carried by suitable .bearings 41. A hollow shaft 42 is mounted in suitable bearings parallel to and directly in front ofthe upper portion of shaft 41. Mounted on shafts 41 and 42 are the f members- 43 and 44 of an intermittent gear, the member 43 having a singley tooth 43. and the member 44 having the same number of-teeth as the rotary frame has receptacles for lamp bulbs f Secured .on shaft 41-v -directly above the bevel gear 40 is a disk having a projection 45 which, when the shaft is rotated crosses the path of movement of the end of the crank 19; projection 45 is of. such 'shape that it prevents movement of crank 19' by pedal 23', until the tooth 43of gear 43 has actuated and disengaged the gear 44.

'llhe shaft 42 is extended up through the table 1 and ies the movable member 46 f which is securedupon the top ofthetbl 46 shaft42 carries a frame consisting of twoplates 4 8 and 49, on the former of which are secureda plurality of supports alve, the stationary member Above the valve-member 50 lfor lamp bulbs. In tlepresent'instance I have shown eight of these supports. Each of these supplorts may consist of a metallic cylinder in w ich isa rubber gasketadapted neet it with a pipe 51. The pipes 51from the'vseveral supports 50 extend downl to'an'd are connected with vopenings in the movable member 46 ofthe valve, these openings being spaced lapart equally concentric with` the valve-member, 'as shown in Fig. 13.

The stationary member 47 of the valve is provided with Ifive openings adapted to aline with five of the openings in the mov of support for a lamp bulb. In this` form al tube 55 is provided, extending from the gasket 56 in the cylinder 50, down into a casing 57, having a removable bottom, and the tube 51 is sealed into the upper end ofthe casing 57. At the upper end of tube 55 is a screen 58 which' serves 4to catch any small particles of glass which may be drawn from the bulb by the pumps, and in the casing 57 between the lower ,end of tube 55 and the connection of the tube 51 is a screen 59 of very fine mesh, which serves to catch oil and vapor. The plate 49 of the frame carried by shaft 42 has eight openings therethrough and a rod 60 is freely movable vertically in each of these openings. Each ofthe rodsl60 carries at its lower end two insulated metallic clips 61.

e Extending up throughI the hollow shaft 42 is a stationary hollow shaft 62l carrying atl its upper end a disk 63 to which is secured a cam 64. Each of the vertically movable rods 60 carries a pin 65 which is adapted to engage and ride over the surface of cam 64.

Secured t'o the under side of disk 63 is the stationaryY member of a commutator 66 consisting of insulating material with four conducting segments a, e, f and g therein, each of which is connected to a wire a', et, f and g extending up through the stationary holf5 tion'ary vbrushes 75 coperating therewith.

low shaftj62. Secured to the plate 49 of the rotatable frame is a disk` 68, on which eightbrushes 69 are mounted equi-distant.

from each other on blocks of insulating material and adapted to bear on the periphery of the stationary member of the commutator. Each of these brushes is connected by a flexible wire 70 to one of the pair of insulated clips 61 mounted on one off the rods 60. Directly under disk 68 and movable therewith is an insulated ring 71 of conducting materiah, and mounted in positionto bear on the inner surface of this ring is`abrush -72 carried by stationary shaft 62 and connected to a wire running down through the hollow shaft. The ring 71 is connected by flexible wires 73 to the 60. Mounted on shaft 11 is a controller for the circuits throughthe commutator66 and consisting of a disk 74 on shaft 11 and staapply heat thereto.

In the disk 74 is anV insulating segment which is so positionedthat it comes under one or both ofthe brushes`7 5 just before the tooth 43 on the gear 43 .engages and. actuates the gear'44, 4and remains under the brush until tooth 43 is disengaged` from gear 44 so that the circuits throughy commutator of this being to open t e circuit at the disk 74 rather than at the commutator 66. Mounted on shaft 11 is a cam 76 with which 66 are held` open while gear 44 ,and the ro tatable frame are bein moved,"the purpose coperates a pivoted lever 77 whichextends up beyond the top of table 1 and is connected by a link 77 to a frame 78 pivoted on studs mounted on the'top of the table, and a spring 78 is connected at one end to frame 78 and/ at the other to a stud ony top of the table to move frame 78 in thedirection opposite to that eii'ected b cam,76 against a stop 76. Secured on tlsiis frame 78 are pipes 79-c0nnected by iex'ible tubes 7 9 with 'a gas supply andcarrying at their upper "ends suitable burners 80, each of which is :arranged to partially encircle a bulb carriedon the rotatable frame (Fig. 3)- and Mounted on the pipe 79 of the middle one of these three heaters is a small blow-pipe burner 81 which is so disposed that thefiame therefrom will play.

on the point of connection of the'tubulature and bulb which is -in this position on the rotatable frame. plied to this burner by iexible tubes 81 .in which is a valve 82 having a .movable mem ber which is connected by a crank and link 82 to a pedal 83. I

Referring now to Fig. 7, I will describe the devices which I employ for indicating 'the leakage -of air to a bulb. TheI bulb which is being heated by the middle one of the three heaters is connected by thev valve members 46' 47 and tube 54 to the final pump 54 and7com-municating with the con l nection to this pump is a-branchl pipe 84 Gas and air are suphaving an enlargement 84 at its end into .i

which two sparking electrodes 85 are sealed.

A spark coil ofanysuitable construction, in-

dicated diagrammatically at 85', is connected to the electrodes85. The enlargement 84 -is lmounted at theback Vof a long ,box 85 open at its'forward end and having its interior walls blackened. This box is mounted in a position convenient for lthe operator. to look into the box, and the color of4 the discharge between thefelectrodes '85 indicates the condition of the vacuum within the lamp whichv is connected to the pump 54. If

air is leaking into the bulb thel discharge between the electrodes 85 will appear of such a dierent color that the operator will know immediately that the bulb is defective and by pressing pedal 83 the flame from the blow-pipe burner. 81 will be brought to bear upon the connection of the bulb and tubulature and the connection` sealed so that i. this bulb will be disconnected from the Mounted on shaft 1,1 isa cam 86 (Fig.l 9) with which cooperates a pivoted lever 86 arranged to-operate the movable contact 87 'of a slid'e wire rheoustat-87. This rhe'ostat is provided with an additional contact 88 between'which andthe rst Icontact of the rheostat the lamp 88, mounted on table 1, is connected. i

Mounted dto coperate with the' bulb which is'in the -support 50 a tl the back of the in achine is a cooler 89 connectedto a source of supply of compressed air and-in position ,to direct a blast of air against the bulb. In'the second position before the bulb comes in front of the operator, is a burner 90.

For this position is also provided a blowpipe burner 91 supplied with gas and air by flexible pipes 91 extending through a valve 92, the movable member of which is connected by a crank 92and link .93 Yto a, pedal 93.' The burners 90. and 91 are adaptedtol play upon the tubulature of a lamp to volatilize the chemical therein, and

, as it is necessary that a considerable portion of the tubulature be heated for this purpose, burnerA y91 `is arranged for vertical adjustment, 1t being carriedby a rod 94 connected by a connectlngrod-to a crank on a shaft` 94 (Fig. 14) provided with an operating handle 95, a guide strip 95 on rod 94 being arranged to slide upon a guide 95 Mounted Qn the tablel is a standard 96 carrying at its upper end a horizontal strip 96 having thereon guides in which a sup-` port 97 is arranged to slide horizontally to` ward and away from thebulb on the framec in the position next before coming vin front of the operator.v A spring 97'- connects a block on the end `of support 97 with Ya stud4 on one of. the 'guides secured on the strip 96 to normally press support 97 forward toy ward the bulb. Connected to support `97 by a pin andslot connection is pivoted lever 98, which atits lower end engages the peripheryof a cam 99 'carried by `the shaft 28 this cam and lever and spring'97gare adapted to move support 97 and the parts carried thereby back and.v forth upon the horizontal strip 96v between the vpositions illustrated in Figs: 1 and 2. `Secured to the torward endgof support 97 is an arc-shaped `plate 100 from whiclfextend upwardly`a plurality of rods 101, on which a horizontally disposed arc-shapedplate 102 is adapted to slide'vertically. lAbove plate 102 is blow-pipe yburners 105,. which` are arrangedy at such an angle thatthe flames therefrom i play upon the pointofconnection of the bulb and tu'bulature.T These burners are supplied with gas and air by long flexible tubeslO. t, 4 .i

Mounted onshaft 28 is a cam 107 shown 1n detail in Figs. 10 and 11. This camhas a depression therein and v secured on -the cam directlyvover this depression is a guide strip 108, which is s aced fromthe bottom of the depression a s slight movement between the opposite surfaces of a pin 109 carried by a rod 110 which is movable vertically in suitable guides. Rod 110 is extended below pin 109 and its lower end iconnected preferably by a spring 11,6.

to a pivoted lever 117. The other `end of this` lever carries av weight 118 and also is pivotally connected to the plunger of a dashpot 121i the cylinder of which is secured upon an arm dependin .u from the framework. The upper end o rod 110 is adapted cient distance to permit` ,toengage the bottom of the plate 102 and lraise the same and the v parts supported thereby. One .of the sleeves formed integral with the plate or'bulb holder 103 and, which i supports the plate so as to permit vertical mctionthereof on'the rods 10,1,v is extended upward and near its upper end lcarries a proiectionv 111 and arranged to coperateY with this projection is a guide112 carried by a support 113 mounted on table 1.I f y The electrical connections yto the bulbs car-k ried by he vframe'are illustrated-diagram# maticall iii-Fig. 8. Wire 114 indicates the Aconnecticut() the positive side of an elec- ,t-ri-c circuit and ,is connected to one of the brushes 75'bearing onfA the mofiblevmemberv 74- of the controller, and from the other one of these brushes a wire 115 leads to the stationary brush 72 bearing on,- the Aring 71 carried by the upper plate 4 9 of the rotatable frame.y As above described this ring `is connectedto one of lthe clips 61 :of each of clip 61 on each of the-rodsy 60is connected 11o the pairs carried4 bythe rods 60. The`other;, t

to one of the brushes'69. The positions of the bulbs when ythe fame'is at rest 4is indi-- cated by the letters A to H. The brushes 69 corresponding tothe vclips for the bulbs in the positions A, E, F and G are in conx tact with theconducting segments 04,6, fand. n

g inthe stationaryvmember 6 6 of the com. mutator. From the segments f andI f/,wiresl fand g extend to adjustableresistances 119 and from these resistances to the'neg a tive wire 120 ofthe circuit. Thegwire e from the contact e vextends to asimilar ad;y

justable resistance 119 and from vthe terminal of this resistanceto the movable contact 87', `of the slide-wire rheostat 87, the" other side of which is connected to the negative wire 120.7 The fourth conducting segment a' in thestationary member 66 of the commutator, is connected by wire a to wire 115 and connected in `Wire a is an electrically-operated bell 122, vand a battery 123 of suiicient strength to` operate' bell 122. he operation of the machine as thus constructed will now be described. The bulbs to be exhausted and sealed-off have the stems carrying the filaments sealed --to the necks of `thebulbs and connected to the other end of the bulbs are the tubulatures throughwhich the air is. exhausted. On the inner Walls of these tubulatures is the 'chemical which is volatilized' to complete the vexhaustion of the bulbs. The koperator bends the two leading-in Wires of a bulb down along the side of the bulb diametrically opposite each other and inserts the end of the tubulature in the support 50 which is. in front of her in the position'A, forcing the end of the tubulature down into the gasket in the support a sufficient distance to make a good air-tight connection thereto. Also sh permits the rod 60 directly above the support 50 to drop down until the in- -sulated clips61 thereon embrace the neck 'of'. the bulb between them and make contact With the tw@ leading-in Wires. If this contact is imperfect, that'is, if one of the clipsA 61 is in Contact With both of the leading-1n Wires, the bell 122 will ring and call the operators attention to the defective mounting of the parts. This is done by the comlpletion of a circuit from battery 123 through Wire 115 to brush 72, ring 71 to one of the i .clips 61 forl the lamp, then through the leading-1n Wire to the other clip, to segment a, Wire a and bell 122 andback'- to the fbattcry. If the leading-in Wires are each in contact with only one of the clips 61', the current from battery 123 would have to pass through Athe filament in the bulb which, on account of its high resistance, would prevent the passage of` sufficient current to actuate bell 122.

The bulb having been positioned properly between the gasket in the support and theclips on the rod 60, tooth 20 on disk 23 engages projection 22 thus operating the lever 21, rock shaft 18 and arm 25 and caus- 50 ing shaft 14`to make one revolution in the manner above described. This one revolu- ,tion of shaft 14 turns shaft 28 through onehalf of a revolution and the pin 29 on gear 27 thereon operates arm 31 to rock shaft 30 and operate the clutch for shaft 11, thus causing shaft 11.to make one complete revolution. In doing so shaft 11 actuates lever 77 to tlrn frame 78 on its pivots and carry the heaters 80 back from the rotatable frame. When these heaters have reached vthe back position, the tooth 43 engages a tooth of 'gear 44 and turns the gear and th'e shaft 42 on Iwhich it is secured one-eighth of a revolution and at the completion ofthis movement the cam 76 permits frame 7 8 to be moved back to its .original position by the spring 7 8. This brings the yfirst one of three heaters into position for heating the bulb which the operato` inserted in its support and which is in position B and the operator proceeds to insert another bulb in the support which is then in front of\her in a similar manner. When the rotatable frame is turned through one-eighth of a revolution in this, manner, the movable valve-member 46is turned to such a posit-ionthat the opening therethrough to which the pipe 51 leading to the bulb now inposition B is connected, yis carried into alinement with the opening 5.2 in the stationary valve member-47, which latter is connected by the pipe T53 to the rough pump 53 and his ump draws most ofthe air from the bulb. The half revolution made by shaft 28 also actuates the sealing-off mechanism, as does also the next half revolution of shaft 28 effected by tooth 20 engaging the projection 22, but this second half revolution does not cause afrevolution of shaft 11, and consequent 4turning movement of the rotatable frame, as the pin 29 on gear 2.7 does not engage lever 31 in the second half revolution. The manner in which the sealing-off mechanism is actuated, will be described in detail hereinafter. After this ,second en gagement of projection 22 and the mounting of another bulb in the support in front of the operator, shaft 21 continues to revolve and tooth 20 again engages projection 22, thus moving the heaters back, .turning the frame through one-eighth of a revolution, arid moving the heaters forward again as above described. This brings the bulb which was first inserted to the .position C and turns the movable`vualve-member 46 to such a position that the opening to which this bulb is connected alines `with the first of the four openings in the stationary valve member which are connected by pipe 54 to the final pump54. The bulb isheated by, the middle one of the heaters 80 andthe operator by glancing into the box 8 5. determines whether or not the bulb is properly sealed, if it is not so sealed, she presses pedal 83, thus turningon'the flame ,from the blow-pipe burner 81 and sealing-oft' the lamp. Tooth 20cnow rocks shaft 18 to operate the sealing-off mechanism Which, as .above pointed out, does not actate "the rotatable frame. After this Jnas been done and another bulb has been placed inthe support in front of the operator, tooth `20 again causes shaft 18 to be rocked and the frame turned again through one-eighth of a revolution While the burners. 8O are held in the retracted position. This carries the bub Which was first inserted, to the position D, where it is acted upon by the third of the' heaters 8O and also by the final pump. Tooth 20 then engages projection 22 to actuate the i' sealing-off mechanism, .and another bulb having been'inserted Iin'thl support in front @which it was raised by burners y80 toa tem- IOI-perat'ure which will permit intense incanof the operator, tooth `engaging projection 22 lagain carrying the bulbwhich was first inserted, to the position E, in which the cooler 89 plays upon the bulb to reduce its temperaturel from that necessary for exhausting by thesmechanical pumps to descence of. the filamenti without* causing overheating and collapse of the bulb.

'When 'the frame is moved to carry the bulbI to the .position E, the brush 69, to

which one of the clips 61 for the bulb is connected, engages the segment e of the commutator and as shaft 11 nears the completion of the revolution which effected the turning ofthe frame to carry V.the bulb to the position E, the cam 86 thereon actuates the lever' 86 to move the movable contact 87 of. the rheostat, from the contact 88 to the coils of. the rheostat and over the same and then back to its original position, this backward movement being effectedby a suitable spring vshown at 67,'Fig. 4. As the head comes :tos rest before the cam 86 actuates the movablecontact of the rheostat 'the 'circuit of thef'filament of the bulb in the position Ej isnfrst com leted 'from the positive 4vwire 114tocontact 5, disk 7 4., contact k7 5, wire .115, brush 72, ring 71, contact 61 to one of/.the leading-in wires,through ythe ,filament tothe other leading-in wire, 35

and the other contactll and back to vthe brush 69, segmente, wire e', rheostat119 to movable `contact 87,1amp 88, rheostat87 andnegative lead 120. As cam 86 actuates the movable contact 87 of the rheostat, vthe lamp 88 on the table 1 is first cut out of circuit and after itl the coils of-the rheostat 87; 'when theseuhave all beeny cut out, the

filament of thebulb on the frame is glowing much above normal inca'ndescence, the prpose of this being to drive gases out from the various joints between the lfilament and the supports therefor, and immediately thereafter the movable contact Vof the rheostat returns to its normalposition.I After' the filament'has been worked in this way, and after tooth 20 has operatedtoactuate the sealing-ofi mechanism and another bulb has been inserted in the support in front vprojection 22 and the "frame rotate of the operator, tooth 20` again engages loneeighth `of a revolution carrying the bulb which. was first inserted to the position F.-

In this position, as also in the positions $1, D and C,the connectionof the bulb to l he final pump `is maintainedas the stationary valve-member 47 is provided with four openings to-aline with the opening of the /movable-valve-member in leach of these positions 'and-connected to the finalpump by i5 pipes 54. In the position- F the circuit of the filament is completed from the ring 71 throughfthe filament as before to\ the segment f and then through 'wire 67 and rheostat 119 to the negative side ofthe circuit.

After tooth 20 operates to actuate'the sealingofi mechanism and supplying a bulb to the support infront of the operator, tooth .20 a ain rocks shaft 18 and carries. the

o sition F to the position G in lamp rom which the amp is disconnected Ffrom the pumps and the chemical in thetubulature is volatilized for perfectingthe vacuum.- In the positiony G the burner plays uponthe tubulature as does also the flame from the blow-pipe burner 91 when theoperator presses the pedal 93 to actuate thejvalve 92 andthus supply gas and air tothe burner. The operator also manipulateshandle 95 to cause the fiame from burner 91 to play over the whole length -of the tubulature 4and lat the same time watches the eect of the -volaf tilization v of the chemical,l and when the bluish discoloration in thebulb has disappeared she releases pedal 93, thus cutting ofi the supply to burner 91. Afterthis has been done and tooth 20 again 'operates to 'actuatethe sealing-oft" mechanism and la.

bulb has'been inserted in the supportin front of the'operator, tooth 20 again operates to rotatethe frame through. one-eighth of a revolution as before, thus carrying the" bulb from the position G to the position H for sealing-0E. Inmoving to this position,

the pin 65 on the rod 60 for the bulb engages the cam 64 and the cam. raises the rod to lift the clips. 61 away from the bulb as shown' in Fig. 2. Tooth 20 again engages projection 22, thus causing shaft 14 to make one complete revolution and shaft 28 one-half a revolution, this latter being the one-half revolution in which the pin 29 does not actua-te the lever 31. The first part cam 99 far enough to permit lever 98 to 'turn on its' pivot and thus allow spring 97 yto move the support 97 and all of the sealing off parts carried thereby forward from 'of this half revolution Jofshaft 28 rotates ,l

the position, shown in Fig. 1l until the arctinues the strip 108 on cam 107 engages pin 109 and raises rod 110 vertically and the upper end of the rod engages the lower side o plate 102 and moves 1t upward upon the `rods 101.A As the springs 104 which support the bulb holder 103 rest upon plate 102, the

bulb holder'103 is also raised and the inner wallsthereof engage the bulb.

bia

As the gasket into which the tubulature of the bulb extends, holds the tubulature, the bulb is not raised by plate or bulb holder 103, but instead springs 104 are compressed somewhat. When the parts are in this osition the flames from the burners 105 p ay upon the point of connection between the bulb and tubulature and soften the glass at this point. As the glass is softenedjthe ro`d 11() is raised vertically by the weight 118, this movement being made smoothand regulai` by spring 116 and dash-pot 121, and the pin 109 on rod 110 moving between-the strip 108 and the bottom ofthe depression cam 107, and this upward movement of rod 110 by weight 118 raises plates 102 and 103 and the bulbv supported on bulb holder 103 tb stretch the softened glass and finally-.break the same. The tubular formation of this connection to the bulb is, ofcourse, closed as soon as theglass begins to soften so that when the two glass partsv are severed the tubulature is closed at its endv and the opening td the bulb is'closed leaving a small tip. Immediately after the lass is broken the springs 104 raise bulb older 103 and the Y bulb carried thereby as there is then nothing to hold the springs under compression. will be observed that this movement of the bulb is independent of the burners 105 so that the bulb is carriedk away from the flames and there is therefore no danger of heating the end of the bulb so much that the vacuum within the bulb would draw the end oftl of the bulb having been effected in this manner, tooth 20 engages projection 22 causing one revol/ution of shaft 14 and onehalf revolution of shaft 28, this being the half revolution of shaft 28 in which pin 29 does actuate lever 81. Before .pin ,29 engages lever 31, however, gam 107 acts on pin 109 to lower rod 110 and then cam 99 operates lever 98 to slide `support 97 and the a revolution. This brings the support 50 which carried the bulb which was sealed-oli:`

ator removes the tubulature which was used therefrom, mounts another bulb ain it'aplace and removes the completed bulb from its support 'on bulb holder 103. When the support moves to position A from position H cam 64permits the rod 60 corresponding wall in and collapse the bulb. The sealing-A sealing oil' parts carried thereby back from' back to the starting position A and the operto the support to drop down to its normal position mi readiness for mounting the new bulb. t.

When the machine is in operation, all ,of the eight supports 50 carry bulbs and one \or more steps in the operations of exhausting and sealing-off lamps are being performed on each bulb. At the position A the used tubulatures are removed and bulbs irtserted. At B the bulb is connected to the rough pump and heated. At C and D the bulb is connected to the final pump and heat-4 ed.` At E the bulb is connected to the nal pump and cooled and alsovit is Worked, that is the filament is caused to glw above normal incandescence to drive out the gases. At F the bulb is connected to theflinal pump and the filament glows at about normal incandescence. At G the chemical in the tulbulature is volatilized to perfect the vacuum. And at H the bulb issealed off. Once in every revolution Iof shaft 21 tooth -20 to yseal off a bulb. Once' also during the ing-offl devices back and also moves the heatf ers 8O back, then turns the bulb-carrying frame, the movable valve-member and the movable member of the commutator around one step and then moves the heater'80 for-l ward again and operates the movable contact 87 of the rheostat. The duties of theI operator involve only mounting the bulbs in position, removing them when completed, a glance at the vacuum indicator as each bulb comes to the position C and the' adjustment of the heater 91 for each bulb in the position G.

machine substantially as that shown herein for performing the operation of exhausting and sealing-in effects a great saving in the cost of production of' lamps as these two steps in the process of making the lamps are performed rapidly and without an intermediate handling ofthe bulbs and also as the machine can b e-operated by an unskilled ,laborer instead of one having considerable skill as has been required heretofore particularly for sealing-ofi' the bulbs. This latter operat-ion has heretofore been done by hand and required a skilled operatorbecause the llame for softening the glass must be applied at just the right --point in order to form as small a tip as possible without endangeringkk the bulb by heating its end too much.l My machine performs this operation automatically., manipulating the parts with such delica'c'ytha-t a small tip is formed an dangerous heating of the bulb prevented. This is effected by moving the bulb and tube relatively as soon as .the glass is softened to stretch and finally bfr'ak the softened glass and then moving the'r'bulb and flames relamoves the sealing-off devices forward into position and they then operate automatically It will readily be seen that the use of al;

same revolution tooth 20 moves the sealtively. The sealing-oitI of the bulbs therefore does notjrequlre any of the7 operators time and as the duties of the operator are few and require little time, the machine can berun quite rapidly. v

, at I claim as new aiid desire tosecure by Letters Patent of the United States, is:

1. In a lamp making machine, ea supportr for a bulb, a "pump, automatic means for- -thepump tothe bulbs insaid su ports, a

20. f 1 bring the tubulatures of the bulbs vin the heater, means for rotating the ame to ,supports thereonv 'before the heater, and

-means for at will moving said heater todi- ..rect"the flame thereof against any-desired part of the tubulatures'.- 3; A machine for making incandescent lamps comprising a movable frame, a supvport` for a bulb carried thereby, a current 'carrying member mounted on said frame tomove into andy out of engagementwith thel leading in wires of a bulb insaid support, and means whereby said member is automatically moved away from the bulb at a predetermined point in the movement of said support.

4. A machine for making incandescent lamps comprisi g afmovable frame, a support for a bulb arried-thereby, a rod having contacts vthereon and mounted on said frame to move in alinementjwith said support to carry the contacts into and out of engage-' ment with the leading in wires of lthe bulb inl said support, and a stationary cam vfor vlifting said rod away from a bulb in the support at a predetermined point in the travel of said frame.

5. In an exhausting machine, a support for a bulb, contacts for making electrical connection tothe leading-in wires of a bulb in said support, and meansffor' giving an indication when said electrical connection is improperly made.

6. In an exhausting machine, Vsupport for a^bu1b, contacts for nriaking,electrical`v connect-ions to the leadingin 'wires of'a` bulb in said support, an"electrically-operated in'. d1cat1ng dev1c e, and means for causing said .leading-in ,wires. 7. In anxhausting machine, of vsupports for bulbs, a

valve having a( movable member, a pump, connections between the valve andthe pump and bulb'supports,

`meansfor operating the movable valveone of` said said supports, and a burner mounted in position to coperate with the tubulature of .a

bulb held in a support to seal-oft' the bulb if defective, and means for at will bringing said burner into se'aling oii' relation to the bulb.

8. In a machine for making'incandescent lamps, a rotatablefframe, a plurality of supports for bulbs carried thereby, a rod movable in axial alinement withl each of said supports, and two insulated metallic clips carried by each of said rods and flared out into position to make contact'with the leadi i, 8 0

ing-in wires of a bulb when the rod is pressed and the leading in Wires are bent down along the bulb on opposite sides r 9J vA lamp making machine having means for supporting a bulb and its tubulature, means for exhausting a bulb, a-heater-for -softening the glass at'the connection between the vbulb and tubulature, means for moving bothtlie bulb and heater to keep the tubulature hot as said tubulature softens, and

relatively both to the tubulature and to said heater toseal off when lthe glass is -completely softenedl J\ 10. A lamp making. machine having means 'for supporting al bulb and its tubulature, means for exhausting the bulbthrough the tubulature, a heater for softening the glass at the connection between the means for automatically vmoving the bulb bulb and tubulature, and means fory aui* tomatically moving the vbulb and heater relatively to the tubulature and then moving the bulb relatively to both the heater and the tubulature to seall off when the glass is softened. i

11. AX lamp making machine having means for supporting a vbulb and its tubulature, means for exhausting a bulb through the tubulature, a heater for softening the glass at the connection. between the bulb and tubulature, and means for moving the bulbvandl tubulature relatively and then moving the bulb and'heater relatively.

12. A lamp making machine having supports fora 'bulb nd its tubulatures, means for exhausting ,alle .bulbY through\the tubulature, `a heater for softening vthe glass at the connection between the bulb and tu- 4 bulature, `and automatic means dependent i on softening of the glass for rst moving bulb away from the tubula ure and then away from both thef-tubulature and s aid heater to eEect the seal.v

A lamp making machine having supports for th for exhausti thebulb through the tubulaturefa heater fory softening the glass at the connection between the bulb and tubulature, means for moving both'said heater `and said -bulbaway from said tubul'ature, K

ulb and its tubulature,- means lature, a

I bulb and hold the same,

and a spring arranged to 4move the bulbsupport and heater relatively to complete a seal when the glass is fully softened.

14. A lamp making machine having means for supporting a bulb yand its tubulatnre, means for exhausting the lamp through the tubulatnre, a heater for softening the glass at the connection between the bulb and tubuweight mounted to exert a pressure to rmove the bulb and tubulatnre relatively to each other, and additional means for moving said bulb relatively both to the tubulature and to the heater when the glass is softened.

15. A lamp making machine having means for supporting a bulb and it-s tubulatnre, means for exhausting thebulb through the tubulatnre, a heaterl for softening the glass at the connection between the bulb and tubulature, means'for moving the bulb and tubulature rela-tively when the glass is softened, means for further moving the bulb relatively to both tubulatnre and heater to 4complete the seal, and a retarding device regulating the movement of the parts.-

16. A lamp making machine having means for supporting a bulb and its tubulatnre,l means for exhausting the bulb through the tubulatnre, a heater for softening the glass at the point of connection between the bulb and tubulature, a weight, means actuated thereby for moving both th'e bulb and the heater relatively to the tubulatnre but in substantially unchanged relation to each other when the glass is first softened, and a spring for then moving the bulb relatively tothe Lheater when the tubulatnre is Ncompletely fused. l,

17. A lamp making support adapted to receive a bulb and hold the same, to said support for exhausting the bulb through the tubulature, mounted thereon, a bulb holder yieldingly supported on said plate, and means for moving said plate and the heater and bulbholder supported thereon relatively to the bulb held in said tubulatnre support until the bulb engages said bulb-holder and depresses the same.

18. A lamp making machine having a support adapted to receive the tubulatnre of a means connected to said support for exhausting the bulb through the tubulatnre, a late, a heater mounted thereon, a bulb-hol er yieldingly supported on said plate, means for moving said plate to carry the bulb-holder mounted thereon into axial alinement with the bulb held in said tubulatnre support, and means for moving the plate and. bulb relatively until the bulb engages the bulb-holder and depresses the same.

19. A lampmaking machine having a support adapted to receive the tubulature of a machine having a the tubulatnre of i thereby, sealing-o means connected` a' plate, a heater bulb-and hld the same, a heater for softening the glass atthe connection between the bulb and tubulatnre, a bulb holder, a movable member for bringing the bulb-holder into supporting relation to the bulb and moving the bulb as the tubulaturel softens, and resilient means between said bulb-holder and said member for moving the bulb-holder relatively to the tubulature support when the glass is softened by the heater.

20. A lamp making machine having a sup-l the tubulatnre of a port .adapted to receive means connected to bulb and hold the same,

said support for exhausting the -bulb through.

the' tubulatnre, a plate, a heater mounted thereon, a bulb-holder yieldingly supported on said plate, means for moving said plate and the heater and bulb-holder supported thereon relatively tothe bulb held in said tubulatnre support until the bulb engages said bulb-holder and depresses the same, and additional means for raising said plate and the parts supported thereon when the heater softens the glass.

21. A lamp makingmachine having a support adapt-ed to receive the tubulatnre of a bulb and hold the same, a plurality of rods mounted parallel to the axis of a bulb held by said support, a plate movable on said rods, a heater mounted on said plate, a bulbholder also movable on said rods, springs supporting the bulb-holder on said plate, and means for moving the plate and the parts carried thereby axially of the bulb held in said tubulatnre support.

22. A sealing-off machine having a frame,

a plurality of sipports for bulbs carried devices, means for moving said frameand sealing-olf devices relatively to bring the bulbs carried by the frame into operative relation' to the sealing-'off devices successively, means for moving the sealing-off devices into and out of position for ,operating'upon a bulb, and means for operating the sealing-olf devices.

23. VA lamp making machinerhaving arotatable frame, a plurality of supports for bulbs carried thereby, exhausting means connected to said supports to exhaust the bulbs,

v sealing-off devices, means actuated by the operator for at will moving said devices into operative relation to a bulb supported on the frame, and means actuated by the operator for at will moving said devices away from the frame. and then rotating the fram through a definite angle.

24. A lamp making machine having a support adapted to receive the tubulatnre of a bulb and support the same, means for ex-v hausting the bulb through the tubulatnre, a bulb-holder, a heater, means for moving the bulb-holder into position for supporting the heater intov positionifor heating the connection between the bulb and tubl'ature, and

bulb in said tubulatnre support and the means for moving the bulb holder and heater relatively to the tubulature support and then moving the bulb holder relatively to said heater when the glass is softened.

25. A lamp making machine comprising a rotatable frame, a plurality of supports thereon each adapted to receive the tubulature of a bulb and support the same, means connected to said supports to exhaust each bulb through its tubulature, a bulb-holder, a heater, means for. moving 'the bulb-holder into position for heating the connection between the bulb and its tubulature, means for moving the bulb holder and heateri relatively to the tubulature support `and for further moving the bulb. holder relatively to the heater when the glass is softened, and means i my hand this 21st day of May, 1906.

WILLIAM R; BURROWS. Vitnesses:

LOUISE SCHEM., WM. J. DEsMoND. l 

